PulsAPI vs IsDown: Catalog Size or Knowing What You Depend On

IsDown monitors a larger catalog (6,320+ services versus PulsAPI's 2660+) and includes SSL certificate monitoring and a Datadog integration. PulsAPI works the other way round: it connects to your GitHub repositories, works out which vendors your stack actually calls, and maps each one to the business capability it supports. It also does not cap how many services you monitor on Pro and above.

It depends on monitor count. IsDown's entry plan is $27/month ($22 billed yearly) for 15 monitors, and its 30-monitor Pro plan is $49/month ($40 billed yearly). PulsAPI Pro is $29/month, or $23/month billed yearly, with no limit on monitored services, so compare the price for the number of vendors you need. IsDown also has no permanent free plan, only a 14-day trial, where PulsAPI's free plan covers 3 monitored services with email alerts indefinitely.

Three things. IsDown monitors 6,320+ services. It monitors SSL certificate expiry, which PulsAPI does not do at all. And it integrates with Datadog, which PulsAPI does not (PulsAPI monitors Datadog's own status, but does not send data into it). If any of those is a requirement, IsDown is the better fit.

PulsAPI is an IsDown alternative for teams that want stack auto-discovery, business capability impact mapping, and unlimited monitored services. StatusGator is the alternative for the widest catalog. Better Stack fits teams that want to monitor their own infrastructure rather than their vendors' status pages.

IsDown publishes 6,320+ services against PulsAPI's 2660+. PulsAPI's answer to the gap is discovery rather than catalog size: connect GitHub and it reports which vendors your stack depends on and how many of them are covered, so you can check against your real dependency list instead of a catalog count. Uncovered vendors can be added as custom service probes or requested.